WO2015063139A1

WO2015063139A1 - Cable pre-chocking device and method for producing tensioning-element ties

Info

Publication number: WO2015063139A1
Application number: PCT/EP2014/073200
Authority: WO
Inventors: Karsten Albers; Hendrik EGBERTS; Ingo Meyer
Original assignee: Wobben Properties Gmbh
Priority date: 2013-10-29
Filing date: 2014-10-29
Publication date: 2015-05-07
Also published as: TW201533305A; AR098228A1; DE102013221956A1

Abstract

The invention relates to a cable pre-chocking device for chocking tensioning cables (200) in a tensioning-element tie (300). The tensioning-element tie (300) has a plurality of openings (310) for receiving first ends (201) of tensioning cables (200). The openings (310) in the tensioning-element tie (300) are designed to receive both the first ends (201) of the tensioning cables (200) and the compression chock (400). The cable pre-chocking device has a clamping unit for clamping the tensioning-element tie (300) and a die for compressing the compression chock (400) into the openings (310).

Description

Litzvorverkeilvorrichtung and a method for producing tendon fixed anchors

The present invention relates to a strand pre-keying apparatus and method for making tendon fixed anchors.

In wind turbines with a concrete tower, which is made up of different segments, the concrete tower is then braced by tension strands or tensioning cables. These tension strands typically extend over the entire length of the tower and are braced on the tower base and on the tower head. Typically, a tension cord anchor is provided at one end of the tension strands.

The German Patent and Trademark Office has in the priority German patent application the following documents: DE 27 23 152 A1, DE 88 07 620 U1 and DE 101 26 912 A1.

It is an object of the present invention to provide a strand pre-keying apparatus, a method for making tendon fixed anchors, and a wind turbine tower which provide a more cost-effective way of producing the tensioning strands keyed with a tension stretcher anchor. This object is achieved by a Litzenvorverkel device according to claim 1, by a method according to claim 3 and by a wind turbine tower according to claim 4.

Thus, a Litzenvorverkeilvorrichtung is provided for wedging tension strands in a tendon fixed anchor. The tendon fixed anchor has a plurality of openings for receiving first ends of tension strands. The openings in the tendon fixed anchor are adapted to receive both the first ends of the tensioning strands and crimping wedges. The Litzenvorverkeilvorrichtung has a clamping unit for clamping the tendon fixed anchor and a die for pressing the Verpresskeile in the openings. The clamping unit has two rotatable Klemmhe- on which an upper part of the clamping unit on a lower part of the Klemmein- clamp the unit, with the tendon fixed anchor between the lower and upper part is clamped.

The invention also relates to a method for producing tendon fixed anchors, each having a plurality of openings for receiving first ends of tension strands, wherein the openings in the tendon fixed anchor are configured such that both the first ends of the tension strands and Verpresskeile can be included. The tendon fixed anchor is clamped in a clamping unit. The first ends of the tensioning strands are inserted into the openings in the tendon fixed anchor so that the first ends of the tensioning strands protrude beyond the tendon fixed anchor. Pressing wedges are inserted over the first ends of the tensioning strands and into the openings. The grouting wedges are pressed into the openings.

The invention also relates to a wind turbine tower having a plurality of tendon fixed anchors which have been manufactured as described above. The clamping lugs, whose first ends are clamped in the tendon fixed anchor, are used for clamping segments of a tower of the wind energy plant.

The invention also relates to a wind energy plant with a tower, which is constructed from a plurality of tower segments, wherein the tower segments are braced by the tendon fixed anchor and the tension strands. The invention relates to the idea to provide a Litzenvorverkeiivorrichtung in which a tendon fixed anchor is wedged in the device and the first ends of the tension strands can be inserted into the holes of the fixed anchor and wherein the tension strands are keyed by Verpresskeilen in the fixed anchor. For this purpose, the anchor is clamped by means of clamping levers and the Verpresskeile be jammed into the holes in the anchor. Subsequently, the tendon fixed anchor can be used with the attached tension strands for bracing tower segments of a wind turbine tower.

Further embodiments of the invention are the subject of the dependent claims.

Advantages and embodiments of the invention will be explained below with reference to the drawings. 1 shows a schematic representation of a wind energy plant according to the invention,

2 shows a schematic representation of a tower of a wind energy plant according to a first exemplary embodiment,

3A shows a plan view of a tensioning straps fixed anchor according to a first embodiment,

FIG. 3B shows a schematic side view of the fixed anchor of FIG. 3A, FIG.

4A shows a plan view of a fixed anchor according to a first embodiment with a plurality of Verpresskeilen,

FIG. 4B shows a schematic sectional view of a fixed anchor of FIG. 4A, FIG.

Fig. 5 shows a schematic representation of a Verpresskeiles according to the

Invention, and

6A-D show various views of a Litzenvorverke device according to a second embodiment.

Fig. 1 shows a schematic representation of a wind turbine according to a first embodiment. The aerodynamic wind energy plant 100 has a tower 102 and a nacelle 104. At the nacelle 104, a rotor 106 with three rotor blades 108 and a spinner 110 is arranged. The rotor 106 is set in rotation by the wind in rotation and thereby drives a generator in the nacelle 104 at. The aerodynamic rotor may be directly or indirectly coupled to the rotor or rotor of the electric generator. The electric generator is disposed in the nacelle 104 and generates electrical energy. The pitch angles of the rotor blades 108 can be changed by pitch motors on the rotor blade roots of the respective rotor blades 108.

Fig. 2 shows a schematic representation of a tower of a wind turbine according to the invention. The tower 102 of the wind turbine has a plurality of tower segments 102a, 02b which are placed on top of each other. The tower segments 102a, 102b can be clamped together by means of tension strands or tensioning cables 200. To this end, tower segments 102a, 102b have a plurality of cladding tubes 102c, through which tension strands or tensioning cables 200 can be guided. According to the invention, a tension cord fixed anchor 300 may be provided on the tower head. At the base of the tower, a clamping unit 500 may be provided, by means of which the prestressed tensioning strands or tensioning cables 200 are clamped. In Fig. 1 is for illustration only Spannlitze 200 shown with a cladding tube 102c. However, the tower 102 according to the invention typically has a plurality of tension strands 200 and cladding tubes 102c. The tensioning cables or tensioning strands 200 may alternatively also run inside the tower, ie not in the tower wall. 3A and 3B show a plan view and a schematic sectional view of a tendon fixed anchor according to a first embodiment. The tendon fixed anchor or fixed strand anchor 300 has a plurality of holes or through-holes 310 into which the first ends 201 of the tensioning strands 200 can be inserted. In this case, the first ends 201 are introduced from a first side 301 such that they project beyond the second side 302. The holes or holes 310 have a larger diameter than the outer diameter of the tension strands 200. The tendon fixed anchor and the fixed strand anchor anchor according to the first embodiment can be used in the tower of FIG. 2.

FIGS. 4A and 4B show a top view and a schematic sectional view of a tendon fixed anchor according to the invention. As in Figures 3A and 3B, the first ends 201 of the tensioning strands 200 are inserted into the openings or bores 310 such that the first ends 201 of the tensioning strands 200 protrude beyond the second side 302 of the fixed anchor. Further shown in FIGS. 4A and 4B are crimping dies 400 which are inserted on the second side 302 of the fixed anchor 300 over the first ends 201 of the tensioning strands and inserted into the holes or holes 310 such that the first end 201 of the tensioning strands 200 are firmly clamped is.

FIG. 5 shows a schematic representation of a crimping wedge 400. The crimping wedge 400 has a first end 410 and a second end 420 as well as a through-hole or hole 430. The inner diameter of the hole 430 is sufficiently large so that the first ends 201 of the tensioning strands 200 can be inserted. The diameter of the first end 410 is smaller than the diameter of the second end 420. The Verpresskeil may be configured as a truncated cone or a truncated cone portion with a through hole.

Figs. 6A to 6D show various views of a strand pre-wedging device. The strand pre-wedging device serves to make the tendon fixed anchors shown in FIGS. 4A and 4B with the first ends 201 of the tensioning strands 200 secured therein. The strand pre-keying device has a cover 1100 which is movable in a closed and an open position. The strand pre-keying device further includes a clamping unit 1400 for clamping the tendon fixed anchor 300. For this purpose, the tendon fixed anchor 300 is placed in a lower part 1440 of the clamping device 1400. Subsequently, an upper part 1450 of the clamping device 1400 may be placed on the tendon fixed anchor 300. The upper part 1450 is then clamped over two clamping levers 1430. The clamping levers 1430 have an axis of rotation 1410 and are actuated by hydraulic cylinders 1500.

The cover 1100 can be reciprocated by means of a rail system 1600.

When the tendon fixed anchor 300 is clamped in the clamping unit 1400, first ends 201 of the tensioning strands 200 are passed through the holes 310 in the tendon fixed anchor 300 so as to project beyond the tendon fixed anchor 300. Subsequently, the pressing wedges 400 are pushed over the first ends 201 of the clamping strands 200 and into the holes 310 of the fixed anchor 300. Thereafter, a die 1810 is moved by means of hydraulic cylinders 1820 in the direction of the clamping device 1400. This movement causes the die 1810 to press the inserted grooving wedges 400 into the holes 310 until the first ends 201 of the tensioning strands 200 are crimped. If the die 1810 is not properly aligned, it may be necessary to rotate the die 1810 to fit snugly against the inserted grooving wedges 400. After the compression wedges 400 have been keyed by the die 1810, the die 1810 is retracted again and the hood can be opened to remove the tendon fixed anchor 300.

According to a further exemplary embodiment, the strand pre-wedging device according to the invention can have a monitoring unit which monitors an exceeding of the strand spike over the fixed anchor (how far the strands protrude out of the fixed anchor, see eg FIG. 3B or 4B). A crimping or wedging process can be interrupted if the strand spikes or strand excesses are above a first threshold value (eg 13 mm) or below a second threshold value (eg 7 mm). This is advantageous because it can be ensured that the tensioning strands are always pressed in the correct position. In the Litzenvorverkeilvorrichtung invention, in particular in the die, z. B. nine initiators can be provided which convert an electrical signal into a length specification, which can then be displayed on a display of the device. When the strands outside the first and second thresholds (ie, if they are too high or too low, too far or too low out of the fixed anchor) then this can be indicated. Optionally, a pressing process can be prevented accordingly. If a compression has been successfully completed, then this can be done by a visual and / or audible indication, z. As a green light, be signaled.

According to the invention, the tendon fixed anchors 300 produced according to FIGS. 6A-6D can be used with the tensioning strands 200 for bracing a plurality of tower segments (according to FIG. 2).

Claims

claims

A strand pre-wedging device for wedging tension strands in a tendon fixed anchor (300), the tendon fixed anchor (300) having a plurality of openings (310) for receiving first ends (201) of tension strands (200),

wherein the openings (310) in the tendon fixed anchor (300) are adapted to receive both the first ends (201) of the tensioning strands (200) and crimping wedges (400)

a clamping unit (1400) for clamping the tendon fixed anchor (300), and

a die (1810), which is adapted to the Verpresskeile (400) in the

Press openings (310)

wherein the clamping unit (1400) has two rotatable clamping levers (1430) clamping an upper part (1450) of the clamping unit (1400) to a lower part (1440) of the clamping unit (1400), the tendon fixed anchor (300) being between the lower and upper part (1440, 1450) is clamped.

2. A method of manufacturing tendon fixed anchors (300) having a plurality of tension strands (200) each having a plurality of openings (310) for receiving first ends (201) of tension strands (200), said openings (310 ) are configured in the tendon fixed anchor (300) such that both the first ends (201) of the tensioning strands (200) and crimping wedges (400) can be received, with the steps

Clamping the tendon fixed anchor (300) into a clamping unit (1400), the clamping unit (1400) comprising two rotatable clamping levers (1430) having an upper part (1450) of the clamping unit (1400) on a lower part (1440) of the clamping unit (1400), wherein the tendon fixed anchor (300) is clamped between the lower and upper parts (1440, 1450),

Inserting the first ends (201) of the tensioning strands (200) into the openings (310) in the tendon fixed anchor (300) such that the first ends (201) of the tensioning strands (200) protrude beyond the tendon fixed anchor (300),

Inserting crimping wedges (400) over the first ends (201) of the tensioning strands

(200) and into the openings (310) into, and

Pressing the Verpresskeile (400) into the openings (310) into it.

3. A method of constructing a wind turbine tower having a plurality of tower segments, comprising the steps of: Producing a tendon fixed anchor (300) having a plurality of tension strands (200) according to a method of manufacturing tendon fixed anchors (300) having a plurality of tension strands (200) according to claim 2;

Placing at least two of the plurality of tower segments (102a, 102b) on top of each other, and

Bracing the at least two tower segments (102a, 102b) by the tendon fixed anchor (300) and the tensioning strands (200).

4. Wind turbine tower, with

a plurality of tower segments and a plurality of tendon fixed anchors and prestressing strands, which are produced or produced by the method according to claim 2, wherein the tensioning strands are provided for bracing the tower segments.

5. Wind turbine, with

A wind turbine tower according to claim 4.